SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function sum (children 1)
     ExpressionList (children 1)
      Function arraySum (children 1)
       ExpressionList (children 1)
        Function dictGetKeys (children 1)
         ExpressionList (children 3)
          Literal \'dict_big\'
          Literal \'grp\'
          Function toString (children 1)
           ExpressionList (children 1)
            Identifier number
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_100000
